#include <iostream>
int main()
{
    using namespace std;
    cout << "This program may reformat your hard disk\n"
            "and destroy all your data.\n"
            "Do you wish to continue?<y/n> ";
    char ch;
    cin >> ch;
    if(ch == 'y' || ch == 'Y')
        cout << "You are warned.\a\a\n";
    else if(ch == 'n' || ch == 'N')
        cout << "A wise choice...bye\n";
    else
        cout << "Thar wasn't a y or n! Apparently you "
                "can't follow\ninstructions, so "
                "I'll trash your disk anyway.\a\a\a\n";
    return 0;
}
